Tube-expander.



Patented May 2o, |9112.y

N0. 7U0,5I0.

' E KNIGHT..

TUBE ExPA'NDEn.

(Application med June s, 1901.;4

2 vSheets--S-heet (No Mdex.)

MQ QNW @lnge/13,

No. 7oo,5|o. Patented may 20,1902.

E.'L. KNIGHT- TUBE EXPANDEB..

, lrpplicatiou led June 8, 1901. (NU Model.) 2 Sheets-Sheet 2l said head is likewise vprovided with'fa cavity A or recess 3 `in its free end; The cavity or recess f vin effecting the expansion.

, UNITED "STATES [PATENT OFFICE.

ELLswoRTII I.. KNIGHT, `or ELKHORN, WEST VIRGINIA.

TUBE-EXPANDER.

SPECIFICATION forming part of Letters Patent No. 700,510, eared May 2o, 1902.

Application lecl .T une 8, 1901. Serial No. B3i828. (No model@ connection with boiler-tubes, whether the lat' ter are provided with Welded seams or affected' with blisters and other inequalitiesoccasioned by the intense heatto which the seams are subjected, and, furthermore, the invention aims to provide an expander whichisx'ofl ,ex-V

tremely simple constructionand oneth'rough vthe use of'which the operation of expanding `tubes may be greatly simplified, aslwellasto effect a reductionin the time usually required IWithfthese general `objects in struction, combination,,an'd arrangement-ict tion of an expander constructed in accordance with the present invention; Figsr2, 3, andl 4 are transverse sectional views on the tudinalsectional view-of theexpander. Fig. 6 is a transverse sectional view similar to Fig. 4,- illustratingthe ratchet-'dog in reverse-v position. 4Fig.`7is 'aside velevation of; the expanderproper removed:l f

Referring to the drawings, the numeral 1 designates a tubular stock or handle, which stock is provided with an enlarged head 2, and

I registers with the longitudinal bore 4 of the stock ork handle 1 and is designed toreceive the expander proper, 5. The latter comprises an elongated body 6, having at one of its ends a head 7, and said head is received bythe view and others which will appear as the natureof the im-"gy lprbvements isbetter understoody the inven-rl` tion consists, substantially, in the novelcon.

lprovided Witha longitudinalbdrel), andiselaft v roo 'cavity or recess 3, the-head 7 being provided' at diametrically opposite points with trans; 4. f. 5Sf` versely-extending grooves 8, ,designed to receive a series of securing-pines, which are inf' serted through the head 2. Aswill be observed,

Atliepinsr 9 are taperin'gand-are'inserted from' oppositesides of the headf2,and by means ofy said pins or groovesStheeXpand'er proper is ityor recess 3. Theexpander proper is proo l v securely but removably held Within the cav# v vided -with a seriesof',longitudinallyextend# ing openings "10, fwhivc'hf;` openings extend i through the head 7 ,andinserted within said openings 10 is a serieel` ofeXpanding-rollers 1l, by means' of whichfthe expansionof they tubes is eieot-ed. Byreasonjofthe'openings 1Q being yalso formedwithinthe head 7 ther rollersll are securely'held in the body`6 and at the same timecapablefofioutward move eifecting the outward moveineritof the lroll,-

. Y 7'o preventedbccomingdisplaced therefrom, butl ment in order to be-broughtinto immediate contact with thetube being actedupon. ForI I Y 75r i f ers 11 a taperingfelongated'mandrel 12 is em-j Y posite to the head 2 `is', reduced indiameter to form an annular 'shoulderr14, and immediately adjacentsaid shoulder is formed a series Y I Y of ratchetfteeth 15.j Mounted upon the re- .,p'loyed, said mandrel being inserted through the bore of the handle lfand bet'weenthe roll- 1 o "ersvll, as clearlysh'own.' vThe mandrel 12 is lprovided withanenlarged'head 13, by. which ,thesame may bereadily grasped for manipul i lating the mandrel'fin'the..use of the ex'- v panden4 p j '4 ,Tofeffect rotation off .thehandle or stock'l and atfthe lsametiinethe expander carried the reby,the end ofthehandle or'stocklop'- duced end of ytheha'ndl'efor stock 1 is an op-.F

'.erating-lever 16, one endof whichis provided jf with a loop oreye 1,7, and said loop or eye is` adapted tov ysurround the {reduced'end of the handle I at nl@ point wherein the `teeth 15ers 95 formed, said loop oreyerbeingsecuredjupon the handle 1 through the4 mediurngof 'a nutlfS. r The lever 16; adjacent theloopzoreyel .lis

ed within said boreis` 'af ratchetedog 20, 'said dogbeing normallyfpressed outwardly by The innerend reversely-arranged engaging face 22, which face is designed to be brought into contact with the teeth l5 in order to rotate the handle 1. By forming the face 22 of reverselyarranged sections t-he movement of the handle or stock l may be reversed by simply rotating the dog 2O approximately one-fourth of a rotation, and this may be effected through the medium of an outwardly-extending stud 23, arranged in a substantially U-shaped slot 24, formed in the lever 16 at a point adjacent the bore 19 thereof. When the stud 23 is within one of the longitudinal legs of the slot 24 and urged to the inner end of the said leg, the dog 20 will rotate the handle 1 in one direction; but immediately upon the stud 23 being shifted to the otherlongitudinal leg, which shifting effects the partial rotation of the dog 20, as above indicated, said dog engages the teeth 15 in such manner as to effect reverse rotation of the handle or stock 1.

Wit-h the parts assembled in the manner herein shown and described the operation is as follows: The expander 5 is inserted in the end of the tube to be expanded until the head 2 of the handle 1 contacts with the tube-sheet, whereupon the mandrel 12 is introduced into the bore 4 and between the rollers 11 until the latter are forced outwardly a sufficient distance to contact with the tube. Pressure is now applied to the lever 16, and as the dog 2O engages the teeth 15 the handle 1, with the rollers 11, is rotated. The tube is thus ex-` panded; but during the movement of the handle 1 the mandrel 12 is gradually forced inwardly to effect greater spreading of the rollers 11 as expansion takes place, and this is continueduntil the tube has become expanded to the desired extent. Should it be necessary to reverse rotation of the handle 1, it is simply necessary to reverse the position of the dog 2O in the manner described, when the handle 1 becomes immediately reversed in its movements upon pressure being again applied to the lever 16.

Vhile the form of the invention herein shown and described is what is believed to bc a preferable embodiment thereof, it is obvious that the same is susceptible of various changes in the form, proportion, and minor details of construction, and the right is therefore reserved to modify or vary the invention as falls within the spirit and scope of my invention.

Having thus fully described4 my invention, what I claim, and desire to secure by Letters Patent, is-

In a tube-expander, the combination with a tubular handle; of a head thereto having a recess in the end thereof, a tubular expander proper having slots therein extending from the inner end thereof, a head at one end of said expander proper extending over the ends of the slots, rollers adapted to be inserted longitudinally under the head and into the slots, said head being fitted in the recess in the handle whereby longitudinal movement of the rollers is prevented, means for locking the head in the recess, a mandrel extending through the handle and the expander proper, and means for revolving the handle.

In testimony whereof I ailix my signature in presence of two witnesses.

ELLSWORTII L. KNIGHT.

Ti tnesses:

E. L. STAFFORD, N. H. FRANKLIN. 

